| 单词 | olefin |
| 释义 | olefin (once / 656629 pages) n WORD FAMILY olefin: olefins USAGE EXAMPLESMethanol, a wood alcohol, is used to make olefins, a component in everyday products such as eyeglasses, insulin pumps and fleece jackets. US News(Apr 19, 2016) It operates globally and manufactures and markets commodity petrochemicals, including olefins, aromatics, polyethylene, polypropylene plastics, and specialty products. Forbes(Jan 12, 2015) It blends methanol with gasoline to produce olefin and plastics. Washington Post(Nov 16, 2014) n any unsaturated aliphatic hydrocarbon Syn|Hypo|Hyper alkene, olefine ethene, ethylene a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic TCE, trichloroethane, trichloroethylenea heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage aliphatic compound organic compound that is an alkane or alkene or alkyne or their derivative |
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